Indenturing apparatus



Oct. 13, 1931. H. w. LARsDN Y 1,826,795

INDENTURING APPARATUS Filed June 12, 1928 I //7 l/ewfof -1 Homer W m50/7 /7 M) 'Vf/@ggg byu//ZLTQ Airy y Patented Oct. k13, 1931 y UNITED STATE-S PATENT-"1' OFFICE i vHOMEE wnnno"LAE-soN,` E Dow-N Eas eRovE, ILLINOIS, AssIGNoa 'ro WESTERN ELECTRIC: COMPANY, INCORPORATED, oENEw YORK, N. Y., "QQEIOEATION orV NEW YORK -f- Application nea Iene 12,

This inventionrelates to indenturing ap' parat-us, and more yparticularly to apparatus for knurling articles which are capable of being rolled. l The primary object ofthe invention'isto provide Y a Vsimple :and eiiicient apparatus for expeditiously and'economically indenting or knurling a portion,'or all, of the/peripheral surface ofan article.r v w In accordance with' the general'features ofthe invention, there is providedin one embodiment thereof anV appara'us for knurling the peripheral surface of articles of'circular cross section, suchas'cylindrical blanks. yThe l5 blanks are fed from a suitable hopper to a ro` tatingA screw member which advances them between a pair of rperipherally opposed in-y denturing or'knurling rolls having co--operating knurl forming surfaces. The linurling rolls are driven in the same direction and at different peripheral speeds whereby the blanks are subjectedto a rolling actionand are simultaneously advanced by the rolls uponbecoming engaged therebetween.k The dilference in the. peripheral speeds of the knurling rolls is such that therolls tend to advance the blanlrsat the same speed as'they are ladvanced by .the screw'member.` Y These and other features and advantages of the invention will become apparent'in the following detailed description, reference be- Hing had to the accompanying drawings, wherein I Fig. 1 is a' front elevational view, partly inv section, of an apparatus embodying ,the features of the invention; c A

,'Fig. 2 is a planvie'w,fpartly in section, of the apparatus shownin'Fig. 1; s' A Fig. 3 is a vertical sectiontakenon line 3-3 of Figi. 1, andf Y Fig. 4 fis an enlarged fragmentary section alien on line 4 4 of Fig. i kThe embodiment 'of the invention yherein il` lustrated land described is particularly suitableforknurlingthe end portionsof pin blanks to facilitate their assembly with companion sleeves (not-shown). These assemblies are used in the manufacture of heat coils of the vtype frequently employed in telephone apparatus. vItv should be understood, how- `roll 20.`

INDENIUEING APBAEATUS 1 i928, i serial N.' 284,717.

like reference numerals designate'correspond`r 55 f ing parts throughout the severalviews, it will be observed that the mainsupporting frame comprises a base portion 10, spaced vertical end portions 11511, and an integral horizental portion 12 interconnecting the end por-` 630' I tions Vand suitably spaced from the base portion. Rotatably journaled in suitable bear-- ings 13e-13 formed integral withfthe base 10 is a horizontally disposed screw'member 15 A having a spiral way 16 formed on its pe- 815';

ripheral'surfacel `A guide plate 17 ris suitably spaced from the'screw member 15 and .serves to hold theV pin" blanks, designated ink the Y drawing .by the reference numeral 18, in a vertical position within the spiral'fway' A16, 70 as best shown in Fig. 4.' A vertically disposed chute 19 '(Fig. 1) guides the blanks fromja. suitable supply hopper (not shown) Ainto the 'receiving' end of the spiral way 16. j e

l Positioned above the screw y memberl'with 75 their axes at'right .angles to the axisv of the f screw member are a pair of peripherallyfopposed cooperatingknurling rolls 20 and y21.

The .knurling roll 20 is secured to a vertical f 'i shaft y22 v(Figi2) 'rotatably journaled inthe 80 horizontal portion 12 of the supporting frame. Thelrnurlingroll 21 is secured to aV vertical shaft 22 rotatably. journaled in a bearing block 2Y4`which is slidable in a dove-tailed slot y 25' (Fig. 3) formed-inthe frame member 12. 85

An adjusting screw '26 threaded in the sup porting frame isoperaf'ively connected tothe f bearing block 24;; v.This construction permits n adjustment of the roll' 21with respect to the- :The 'screw V'inertieifk i-vand the tunning rolls 20 and,21Qarefdriven'from `aemain drive shaft 28 .journaledin bearings 29-29 formed y in the frame members 11-11. A pulley 30 vis secured at one endof the' driver shaft 28 where- 95 byrsaid shaft sdriven by means of a belt 31 froml any suitable source of `powertnot shown). Formed upon the drive shaft 28 are a pair of'driving worms Y32 and 33 (Fig.

2) which` mesh with wormgears'34 and35 10Q? scribed driving gears are designed and ar ranged so that the knurling rolls 2O and `21 are driven in the same direction, as indicated by the arrows in Figs. 1 and 2. The knurling roll 2l is of larger diameter than the knurling roll 20, and since both lniurlingV rolls are driven at the same speed, it is obvious that the peripheral speed of the larger roll 21`is greater than that of smaller roll 20. Due to this difference in theperipheral speeds of the lmurling rolls, the blanls are subjected to a rolling action andare simultaneously advanced by the rolls upon becoming engaged therebetween. rlhe screw member 15 is driven in the direction indicated by the arrow in Fig. 1l, and its rotating speed is such that it advances the blanks at the same speed as they are advanced by the lrnurling rolls. In the present embodiment of the invention the speed at which the blanks are advanced by the screw `member is equal to approximately one-half the diilerence in the peripheral speeds of the lmurling rolls.

In the operation of the above described ape paratus, the pin blanlrs 18 are fed, one at a time, from a suitable hopper (not shown) through the chute 19 which guides them into the spiral way 16 of the screw `member 15. The blanks `are held in a vertical position within the spiral way 16 bythe guide plate 17 and are advanced in this position into operative engagement with the lrnurling rolls 2O and 21. Upon becoming engaged by the positively rotating lmurling rolls, the blanks are subjected to a rolling action due to the diierence in the peripheral speeds of the lrnurling rolls, as hereinbefore described. During this rolling action, the desired knurl ings or indentations are iin-pressed upon the engaged portion of the blank by cooperating teeth or ridges formed upon the peripheral surfaces of the knnrling rolls. ln the presont embodiment of the invention, the upper peripheral portions ofthe linurling rollsare provided with a lciron-.mferential seriesof transverse teeth 42 which cooperate to form a circumferential series of transverse indentations lil upon the upper end portions of the lanlrs; and the lower peripheral portions of thelrnurling ro-lls are provided with a series of circumferential teeth 43 which cooperate to form a series ofcircumferential indentations l5 upon the blanks immediately below the transverse indentations 44. After passing between the knurlingrolls. the completely lrnurled blanks are advanced by the screw member until they drop through an opening 46 provided in the base and may be collected in a suitable pan or receptacle (not shown).

From the above description, it will be understood that by means of an apparatus embodying the features of the invention various types of knurling or indentations may be eX- peditiously and economically performed upon rollable articles, such as pins and the like. lt is to be understood also that the novel features of the invention are capable of numerons other applications within the scope ofthe appended claims.

That is claimed is:

1. ln an indenturing apparatus, a pair of peripherally opposed rotatable members having a series of-transverse and circumferential peripheral projections, and means for driving said members in the same direction at different peripheral speeds.

2. In an apparatus for indenting articles, pair of peripherally opposed cooperating indenturing members, means for positively driving said indenturing members, and a screw member for receiving an article between the threads thereof to advance it into operative association with said indenturing members.

3. ln an apparatus for knurling rollable articles, a pair of peripherally opposed lrnurling rolls, means for driving said rolls in the same direction at diderent peripheral speeds, and a screw member for, advancing a rollable article into operative association with said knurlingrolls. Y

4:. ln an apparatus for knurling rollable articles, a pair of peripherally opposed knul-ling rolls, means for driving Vsaid rolls in the same direction at different peripheral speeds, a screw member for advancing a rollable article into operative association with said lnurling rolls, and means cooperating with the screw member for positioning the article transversely with respect to the knurling roll asit is advanced by said screw member. Y Y 5.1In an apparatus 'for knurling rollable articles, a screw member for advancing a rollable article. a pair of peripherally opposed knul-ling rolls arranged to engage'diametrically opposed portions of the article as it is advanced by the screw member, and means for driving the knurling rolls in the same direction at dierent peripheral speeds whereby the article is subjected to a rolling action upon becoming operatively engaged by said rolls.

6. In an apparatus for knurling rollable articles, a. pair of cooperating knurling rolls arranged to engage diametrically opposed portions of a rollable article, and means for driving said rolls in the same direction and at different peripheral speeds whereby the article is subjected to a rollin-g action and simultaneously advanced by the rolls.

l rollable article, `a rotatable screw member advancing articles properly positioned with respect to the knurling rolls.

p 8. In an apparatus for knurling rollableV articles,V a pair of peripherally opposed knurling rolls carried upon vertically disposed parallel shafts and arranged' to engage diametrically 'opposed portions of a positioned below the knurling rolls with its axis at right angles to the axes of the knurl-v ing rolls, said screw member having a spiral way formed on its peripheral surface for ladvancing an article associated therewith into operative engagement with the knurling rolls and away from said rolls to a discharging position, and a guide member spaced from the screw member and cooperating with the spiral way thereof fory positioning an advancing rollable article with its axis parallel to the axes of the knurling rolls. l .9. In an apparatus for forming rollable articles, a pair of cooperating peripherally opposed forming rolls, means for rotating the rolls at different peripheral speeds to cause the rolls to advance the articles while forming them, and advancing means synchronized with the rolls and operative to advancethe articles to the rolls and to advance them away from the rolls after they have .been

formed.

10. In an apparatus for forming rollable articles, a pair of cooperating peripherally opposed forming rolls, means for positively rotating the rolls, and advancing means synchronized with the rolls and operative to advance the articles to the rolls and to ad- Vvance them away lfrom the rolls after they have been f-ormed,-said advancing means comprising a screw member designed to receive articles between the threads thereof, and

l a guide member cooperating with thescrew member and adapted to retain the articles `in engagement with the screw member.

In witness whereof,'I hereunto subscribe my name this 31 day of May, A. D. 1928.

HOMER WALDO LARSON. 

